.head_nav{
    background: #f5f5f5;
}
ul {
    display: block;
    list-style-type: none;
    margin-block-start: 0;
    margin-block-end: 0;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
    padding-inline-start: 0px;
}

.left-nav-con {
    position: relative;
    float: left;
    width: 1226px;
    height: 460px;
}

.left-nav-con .left-nav {
    padding-top: 20px;
    padding-bottom: 20px;
    position: absolute;
    width: 16%;
    height: 420px;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    top: 0;
    left: 0;
}

.left-nav li {
    display: block;
    color: white;
    width: 100%;
    height: 37px;
    line-height: 37px;
    text-align: left;
    margin-top: 5px;
    margin-bottom: 5px;
    text-indent: 2em;
}

.left-nav li:hover {
    background-color: #FF6700;
    cursor: pointer;
}

.left-nav i {
    float: right;
    margin-right: 12%;
    font-size: 20px;
    font-weight: bolder;
    line-height: 37px;
}

.section-con {
    width: 100%;
    height: 460px;
}

.section-Lnav {
    width: 1226px;
    height: 460px;
    margin: 0 auto 30px;
    position: relative;
    overflow: hidden;
}

.section-Lnav .left-nav-img {
    position: absolute;
    left: 0;
    top: 0;
    width: 1226px;
    height: 460px;
    /* overflow: hidden; */
}

.section-Lnav .left-nav-img .img-box {
    width: 613000000000px;
    height: 460px;
    position: absolute;
    left: 0;
    top: 0;
}

.section-Lnav .left-nav-img .img-box li {
    width: 1226px;
    height: 460px;
    position: relative;
    float: left;
    transition: opacity 1.5s;
}

.section-Lnav .left-nav-img .img-box li.switch {
    width: 1226px;
    height: 460px;
    top: 0;
    left: 0;
    position: absolute;
    float: none;
    opacity: 0;
    z-index: 0;
}

.section-Lnav .left-nav-img .img-box img {
    width: 1226px;
    height: auto;
    position: absolute;
    left: 0;
    top: 0;
    cursor: pointer;
}

.section-Lnav .left-nav-img .img-box li.initial {
    position: relative;
    opacity: 1;
    z-index: 1;
}

.section-Lnav a,
a:hover {
    color: white;
}

.section-Lnav ul {
    display: block;
    width: 100%;
    height: 460px;
}

.img-index-box {
    position: absolute;
    right: 40px;
    bottom: 20px;
    font-size: 25px;
}

.img-index {
    position: relative;
    cursor: pointer;
    z-index: 1;
}

.left-nav-spirte {
    position: absolute;
    width: 1226px;
    height: 460px;
}

.spirte-bg-left {
    position: absolute;
    width: auto;
    height: 50px;
    top: 50%;
    margin-top: -25px;
    z-index: 1000;
    padding: 2px;
    left: 17%;
    border-radius: 5px 0 0 5px;
}

.spirte-bg-right {
    position: absolute;
    width: auto;
    height: 50px;
    top: 50%;
    margin-top: -25px;
    z-index: 1000;
    left: 99%;
    padding: 2px;
    margin-left: -25px;
    border-radius: 0 5px 5px 0;
}

.spirte-bg-left img:hover {
    border-radius: 5px 0 0 5px;
    padding: 2px;
    background: rgba(0, 0, 0, 0.4);
    cursor: pointer;
}

.spirte-bg-right img:hover {
    border-radius: 0 5px 5px 0;
    padding: 2px;
    background: rgba(0, 0, 0, 0.4);
    cursor: pointer;
}
.img-index-box a{
    color: #fff !important;
}

/*=========================================*/

/* .pic_animation {
	animation: img_switch 1s linear 1;
} */

/*=========================================*/

.section-img {
    position: relative;
    width: 100%;
    overflow: hidden;
    transition: 0.4s;
    background: #F5F5F5;
}

.img-list {
    display: block;
    position: relative;
    width: 1226px;
    margin: 0 auto;
}

.img-center {
    width: 100%;
    margin-bottom: 10px;
}

.img-title-text {
    font-size: 22px;
}

.section-img .phone1 {
    position: absolute;
    width: 238px;
    height: 626px;
    margin-right: 2px;
    margin-bottom: 2px;
}

.phone-img .phone {
    width: 238px;
    margin-right: 2px;
    margin-left: 2px;
    margin-bottom: 12px;
    position: relative;
}

.phone-img {
    left: 238px;
    margin-left: 7px;
    position: relative;
}

.item-img {
    position: relative;
    display: inline-block;
    vertical-align: top;
    position: relative;
}

.item-img .item_1 {
    position: relative;
    width: 238px;
    height: auto;
    margin-right: 2px;
    margin-bottom: 5px;
}

.item-img .item_2 {
    position: relative;
    width: 238px;
    height: auto;
    margin-right: 2px;
    margin-left: 2px;
    margin-bottom: 5px;
}

.item-img .item_3 {
    width: 238px;
    position: relative;
    height: auto;
    margin-left: 1px;
    margin-bottom: 5px;
}

.item-img .more_item {
    position: relative;
    width: 238px;
    display: inline-block;
    vertical-align: top;
}

.img-title-text {
    margin-top: 10px;
    margin-bottom: 10px;
}

/*=========================================*/

.phone1:hover {
    box-shadow: 0px 5px 10px 1px #CECECE;
    margin-top: -2px;
    transition: all 0.4s;
    cursor: pointer;
}

.phone:hover,
.item_1:hover,
.item_2:hover,
.item_3:hover {
    box-shadow: 0px 5px 10px 1px #CECECE;
    animation: a 0.4s linear 1;
    top: -2px;
    cursor: pointer;
}

/*=========================================*/

.video-nav {
    position: relative;
    margin: 0 auto;
    width: 1226px;
    height: 285px;
}

/*=========================================*/

@keyframes a {
    0% {
        top: 0;
        box-shadow: 0px 0px 0px 0px #F5F5F5;
    }

    50% {
        top: -1px;
        box-shadow: 0px 3px 5px 0px #F5F5F5;
    }

    100% {
        top: -2px;
        box-shadow: 0px 5px 10px 1px #CECECE;
    }
}